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NWS forecasters said there had only been 22 tornadoes in November in Iowa since 1980. So far, teams have confirmed at least three tornadoes -- and they continue to work.

The team is assessing damage in 1. Marion County and southern Jasper County including Prairie City, Knoxville and Barnes City and 2. Monroe, Appanoose and Wayne counties including the Rathbun Lake area.

TORNADO 1: MELROSE

NWS officials told KCCI's Rose Heaphy that a tornado caused damage in Monroe County. They are still working to determine the tornado's ranking on the Enhanced Fujita scale.

TORNADO 2: KNOXVILLE

Thursday afternoon, the team reported that a high-end EF-1 tornado hit the town of Knoxville about 3:43 p.m. on Wednesday.

Peak winds of the tornado were 110 mph, it had a path of 3.9 miles and was about 100 yards wide. One injury was reported.

Damage was reported to the roof at the Walmart store and to home and trees along the path on the southeast side of the town.

The team reports other damage in southern Marion County east of Melcher-Dallas was from straight-line winds that peaked at 74 mph.

That's where a Hy-Vee semi tractor-trailer was blown over onto its side. The driver told Iowa Storm Chaser Network that his truck was lifted into the air before the crash. The trailer was empty at the time.

TORNADO 3: GUTHRIE COUNTY

A survey team reported an EF-0 tornado hit Guthrie County, the Lake Panorama and Yale areas on Wednesday starting at 2:58 p.m. It had peak winds of 84 mph.

The tornado traveled 3.2 miles and had a maximum width of 50 yards. No injuries were reported.

Damage was mainly to trees and no damage to structures reported.

TORNADO 4: BARNES CITY:

The NWS team reported a tornado was responsible for damage in northern Mahaska and southern Poweshiek counties -- the Barnes City area.

It was a high-end EF-1 tornado that touched down a few miles southwest of Barnes City and had peak winds of 107 mph. The tornado's path was 4.9 miles long and 125 yards wide at it maximum.

No injuries were reported. The tornado destroyed or damaged several buildings, trees and multiple outbuildings were slid off their foundations. The back end of a car was shifted by 2 feet.

PRAIRIE CITY DAMAGE:

Thursday morning, the team checked damage reported in Prairie City, including damage to a Casey's store.

The team reports straight-line winds from the storms caused the damage on the southwest edge of town, not a tornado. The peak wind was 78 mph.

No injuries were reported in Prairie City.

Damage was reported to the Casey's gas station canopy and trees and siding.

More storm examination reports will be released today as the team continues its check on areas hit hard by the storms on Wednesday afternoon.

Gov. Terry Branstad is also expected to tour storm damage in Knoxville on Thursday afternoon.

AVOCA TORNADO:

The NWS has confirmed that some farm damage near Avoca in western Iowa was caused by a tornado.

The service said Wednesday night that a survey team examined the damage and video recordings before rating the twister an EF-1, with winds ranging from 86 to 110 mph.

The service says the tornado touched down Wednesday afternoon in a cornfield west-southwest of Avoca and moved northeast, toppling a semitrailer on Interstate 80 and damaging outbuildings on several farmsteads. No injuries have been reported.

The twister was spawned by a fast-moving storm system that dropped nearly a foot of snow on the Rockies before heading east.

It dumped snow where it met cold enough air and loosed rain and even hail elsewhere. Winds gusting to 60 mph accompanied the system.

KCCI Chief Meteorologist John McLaughlin said based on radar, it appeared a short lived tornado moved across the Warren/Polk County line and traveled north across Des Moines International Airport.

National Weather Service experts will be checking storm damage around Iowa Thursday to survey suspected tornadoes.